The product is a 640GB 3.5" SATA HDD from Western Digital or Hitachi specifically designed for use with PCs. It has a silver color and a storage capacity of 640GB, making it suitable for storing a large amount of data or media files. The hard drive has been wiped, formatted, cleaned, and tested to ensure it is in working order and ready for use in a desktop computer. With a rotation speed of 7200 RPM, this internal desktop drive offers fast data transfer rates and is compatible with SATA interface connections.